CN113007929A

CN113007929A - Flow dividing element and fluid distributor

Info

Publication number: CN113007929A
Application number: CN202110322307.3A
Authority: CN
Inventors: 丁爽; 王飞; 张心怡; 崔文娟; 袁俊军; 李阳; 许文明
Original assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Air Conditioner Gen Corp Ltd; Qingdao Haier Air Conditioning Electric Co Ltd; Haier Smart Home Co Ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-06-22

Abstract

The application relates to the technical field of fluid distribution, and discloses a flow distribution element, including: the element body is provided with a plurality of shunting through holes in a distributed manner, and the porosity of the element body is 60-78%; and the included angle between the axis of the shunt through hole and the normal of the surface where the shunt through hole is located is 0-15 degrees. By controlling the porosity of the shunting holes and arranging the shunting through holes in the opening direction, better mixed flow effect can be achieved on the fluid, so that the fluid flowing through the shunting through holes is uniformly and stably mixed; the fluid distributor containing the liquid separating device has uniform liquid separation, achieves good uniformity and stability, and can achieve uniformity and stability even superior to those of the existing Venturi distributor; furthermore, the heat exchanger adopting the liquid separator has uniform flow distribution and improved energy efficiency. Meanwhile, the flow dividing element disclosed by the embodiment of the disclosure is simple in structure, easy to machine and form and low in machining cost. The present application further discloses a fluid dispenser.

Description

Flow dividing element and fluid distributor

Technical Field

The present application relates to the field of fluid dispensing technology, for example to a flow distribution element and a fluid dispenser.

Background

At present, in a refrigeration system, except for the condition of small refrigeration (heat) quantity, a heat exchanger generally adopts a multi-path parallel connection mode, so that the refrigerant keeps the optimal flow rate, meanwhile, the pressure drop of the refrigerant side of the heat exchanger is limited within a certain range, and when the refrigerant with uniform gas-liquid mixture is equally distributed to each branch, the heat exchanger can be guaranteed to be efficiently utilized. When the refrigerant can not be uniformly distributed to each branch, different superheat degrees can be generated at the outlets of each branch of each heat exchanger, the branch with less liquid supply enters a superheat zone too early, the coefficient of the heat exchanger in the superheat zone is greatly reduced, and the heat exchange area can not be fully utilized, so that the heat exchange efficiency is reduced. For an air-conditioning refrigeration system, when a heat exchanger is an evaporator of an indoor unit of an air conditioner, the uneven outlet air temperature, the reduction of comfort and the like can be caused.

In view of the above, a liquid separator is disposed in front of the heat exchanger to ensure that the refrigerant is uniformly and equally distributed to the branches, and the conventional distributor includes a venturi-type liquid separator and a pressure drop-type liquid separator to uniformly mix the two-phase refrigerant.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art: the existing liquid separator has the problems of high cost and large limitation on the installation environment.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.

The disclosed embodiment provides a flow distribution element and a fluid distributor, which are used for solving the problems of high cost and large limitation on installation environment of the existing liquid distributor.

In some embodiments, the shunt element comprises: the element body is provided with a plurality of shunting through holes in a distributed manner, and the porosity of the element body is 60-78%; and the included angle between the axis of the shunt through hole and the normal of the surface where the shunt through hole is located is 0-15 degrees.

In some embodiments, the fluid dispenser comprises the flow diversion element described above.

The flow dividing element and the fluid distributor provided by the embodiment of the disclosure can realize the following technical effects:

by adopting the flow dividing element provided by the embodiment of the disclosure, through controlling the porosity of the flow dividing holes and arranging the flow dividing through holes in the opening direction, better mixed flow effect can be achieved on fluid (for example, two-phase refrigerant), so that the fluid flowing through the flow dividing element is uniformly and stably mixed; the fluid distributor containing the liquid separating device has uniform liquid separation, achieves good uniformity and stability, and can achieve uniformity and stability even superior to those of the existing Venturi distributor; furthermore, the heat exchanger adopting the liquid separator has uniform flow distribution and improved energy efficiency. Meanwhile, the flow dividing element disclosed by the embodiment of the disclosure is simple in structure, easy to machine and form and low in machining cost.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:

fig. 1 is a schematic structural diagram of a shunt element provided in an embodiment of the present disclosure;

FIG. 2 is a schematic structural diagram of another shunt element provided in the embodiments of the present disclosure;

fig. 3 is a schematic structural diagram of a curved flow dividing element according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of another curved shunt element provided in the embodiments of the present disclosure;

FIG. 5 is a schematic structural diagram of another curved shunt element provided in accordance with an embodiment of the present disclosure;

FIG. 6 is a schematic structural view of another cone-shaped shunt element provided by embodiments of the present disclosure;

FIG. 7 is a schematic structural diagram of a cap-shaped shunt element provided by an embodiment of the present disclosure;

FIG. 8 is a schematic structural view of another cap-shaped shunt element provided by an embodiment of the present disclosure;

9-a-9-n are schematic structural views of various shunt vias of a shunt element provided by embodiments of the present disclosure;

FIG. 10 is a schematic diagram of a fluid dispenser provided in accordance with an embodiment of the present disclosure;

FIG. 11 is a schematic cross-sectional view of the fluid dispenser shown in FIG. 10;

FIG. 12 is a schematic diagram of another fluid dispenser provided in accordance with embodiments of the present disclosure;

FIG. 13 is a schematic cross-sectional view of the fluid dispenser of FIG. 12;

FIG. 14 is a schematic diagram of another fluid dispenser provided in accordance with embodiments of the present disclosure;

FIG. 15 is a schematic cross-sectional view of the fluid dispenser of FIG. 14;

FIG. 16 is a schematic diagram of another fluid dispenser provided in accordance with embodiments of the present disclosure;

FIG. 17 is a schematic diagram of another fluid dispenser provided in accordance with embodiments of the present disclosure;

FIG. 18 is a schematic structural view of another fluid dispenser provided in accordance with embodiments of the present disclosure;

FIG. 19 is a schematic diagram illustrating a top view of another fluid dispenser provided in accordance with an embodiment of the present disclosure;

FIG. 20 is a schematic top view of another fluid dispenser provided in accordance with embodiments of the present disclosure;

FIG. 21 is a schematic top view of another fluid dispenser provided in accordance with embodiments of the present disclosure;

FIGS. 22-a and 22-b are histograms of fluid simulation results for a fluid dispenser of example 1;

FIGS. 23-a and 23-b are histograms of fluid simulation results for a fluid dispenser of example 1;

FIGS. 24-a and 24-b are histograms of fluid simulation results for a fluid dispenser of example 1;

FIGS. 25-a and 25-b are histograms of fluid simulation results for a fluid dispenser of example 1;

FIGS. 26-a and 26-b are histograms of fluid simulation results for a fluid dispenser of example 1;

FIGS. 27-a and 27-b are histograms of fluid simulation results for a fluid dispenser of example 2;

fig. 28-a and 28-b are histograms of fluid simulation results for a fluid dispenser of example 2.

Reference numerals:

100. a shunt element; 101. an element body; 102. a shunt through hole; 103. assembling a structural member; 104. an installation end; 110. a curved shunt element; 120. a cap-shaped shunt element; 200. a fluid dispenser; 210. a distribution chamber; 211. a front cavity; 212. a rear cavity; 213. a transition chamber; 214. an inlet end; 215. an outlet end; 216. a mounting structure; 220. a liquid inlet pipe; 221. a first tube section; 222. a second tube section; 230. a distribution branch.

Detailed Description

So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.

The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the disclosed embodiments and their examples and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation. Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art as appropriate.

In addition, the terms "disposed," "connected," and "secured" are to be construed broadly. For example, "connected" may be a fixed connection, a detachable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. Specific meanings of the above terms in the embodiments of the present disclosure can be understood by those of ordinary skill in the art according to specific situations.

The term "plurality" means two or more unless otherwise specified.

In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.

The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.

It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

Referring to fig. 1 to 21, a shunt element 100 according to an embodiment of the present disclosure includes an element body 101, on which a plurality of shunt through holes 102 are distributed, and a porosity of the element body is 60% to 78%; and the included angle between the axis of the shunt through hole 102 and the normal of the surface where the shunt through hole is located is 0-15 degrees.

By adopting the flow dividing element 100 provided by the embodiment of the disclosure, through controlling the porosity of the flow dividing holes 102 and arranging the flow dividing holes 102 in the opening direction, a better mixed flow effect can be achieved on fluid (for example, two-phase refrigerant), so that the fluid flowing through the flow dividing element is uniformly and stably mixed; the fluid distributor containing the liquid separating device has uniform liquid separation, achieves good uniformity and stability, and can achieve uniformity and stability even superior to those of the existing Venturi distributor; furthermore, the heat exchanger adopting the liquid separator has uniform flow distribution and improved energy efficiency. Meanwhile, the shunt element 100 of the embodiment of the present disclosure has a simple structure, is easy to machine and form, and has a low machining cost.

In the embodiment of the disclosure, a gas-liquid two-phase refrigerant in a refrigeration cycle enters a fluid distributor, when the refrigerant flows through the flow dividing element 100, an original flow line is broken by the flow dividing element 100 to form a turbulent flow, meanwhile, a high-speed refrigerant generates a vortex under the action of the front-back pressure difference of the flow dividing element 100, the gas-phase refrigerant and the liquid-phase refrigerant are fully mixed, the refrigerant with uniform gas-liquid mixing is equally distributed to each branch, and thus the heat exchanger is efficiently utilized.

Optionally, the element body 101 has a porosity of 65% to 78%.

Optionally, the element body 101 has a porosity of 69% to 75%.

In the embodiment of the present disclosure, the number of the shunt holes 102 on the shunt element 100 may be limited to be greater than 60 meshes according to the porosity requirement of the shunt element 100. Optionally, the number of the shunt holes 102 on the shunt element 100 is greater than 60 and smaller than 110. Optionally, the number of the shunt holes 102 is 70 meshes, 80 meshes, 90 meshes, 100 meshes, or the like.

In some embodiments, the shunt element 100 is obtained by constructing a plurality of shunt holes 102 on a solid body; alternatively, the shunt element 100 is woven from a filamentary material; alternatively, the shunt element 100 is constructed from a porous media material. The processing and forming are simple and the processing cost is low. Of course, the manner of forming the shunt element 100 is not limited to the three.

Alternatively, the shunt element 100 is obtained by constructing a plurality of shunt holes 102 on a solid body. The solid body is made of metal, fiber or plastic.

Alternatively, the shunt element 100 is a wire mesh woven from a filamentary material. Wherein the material of the filamentous material includes metal, fiber or plastic, and the shunt element 100 is a metal wire mesh, a fiber wire mesh or a plastic wire mesh, respectively.

In this embodiment, on the premise of ensuring the porosity of the screen, the specification of the screen is preferably greater than 60 meshes. Optionally, the gauge of the screen is greater than 60 mesh and less than 110 mesh. Optionally, the mesh size is 70 mesh, 80 mesh, 90 mesh, or 100 mesh, etc.

In this embodiment, the diameter of the filament material is 0.06-0.15 mm. Optionally, the filamentary material has a filament diameter of 0.08mm to 0.12 mm. Optionally, the filamentous material has a filament diameter of 0.08mm, 0.1mm, 0.12mm, or any other value within a range of 0.06-0.15 mm.

Alternatively, the gauge of the mesh comprises 80 mesh, with a wire diameter of 0.1mm (porosity of 75%), 0.12mm (porosity of 70%), or 0.15mm (porosity of 63%).

Alternatively, the gauge of the wire mesh comprises 90 mesh, with a wire diameter of 0.1mm (porosity of 72%) or 0.08mm (porosity of 78%).

Alternatively, the gauge of the mesh comprises 100 mesh, with a wire diameter of 0.1mm (porosity of 69%), 0.08mm (porosity of 75%) or 0.12mm (porosity of 63%).

Alternatively, the shunt element 100 is constructed from a porous media material. Specifically, the shunt element 100 is a porous dielectric material prepared in situ; the shunt element 100 can be made of a porous dielectric material prepared in situ, such as a porous metal material, nickel foam, titanium foam, etc., by integral molding. Alternatively, the shunt element 100 is constructed by filling a granular porous medium material in a molding frame; the molding frame is designed to have the shape of the body of the shunt element 100, and the molding frame is filled with the granular porous medium material. The desired flow distribution element 100 can be obtained by adjusting the parameters of the particle size, porosity, etc. of the granular porous media material.

In some embodiments, the shape of the element body 101 includes: plate-like (as shown in fig. 1), curved (like bowl-like, as shown in fig. 3), conical (as shown in fig. 6), frustoconical, or cap-like (as shown in fig. 7). The cap is in a special frustum shape, namely the connection between the upper bottom surface and the side wall of the frustum is in curved surface transition connection. Of course, the shape of the body is not limited to the above-listed ones, and other shapes may be applied to the shunt element 100 of the disclosed embodiment as long as the porosity thereof is secured within the range of 60% to 78%.

In some embodiments, the element body 101 is plate-like in shape. In this embodiment, the shunt element 100 is a plate-shaped body as a whole. As shown in fig. 2, the angle α between the axis of the shunt hole 102 and the normal of the surface (the plane of the plate-like body) on which the shunt hole is located is 0 ° to 15 °. Here, the normal (defined as the first normal m)₁) Is a perpendicular line perpendicular to the plane of the plate-shaped body. That is, the shunt holes 102 are arranged in parallel or obliquely in the axial direction of the plate-like body. When the shunt hole 102 is disposed obliquely in the axial direction of the plate-like body, the inclination angle (i.e., the included angle α) is greater than 0 ° and equal to or less than 15 °.

In some embodiments, the shape of the device body 101 is curved. In this embodiment, the whole shunt element 100 is a curved body. As shown in fig. 4, of the shunt hole 102The included angle alpha between the axis and the normal of the surface (curved surface) is 0-15 degrees. Here, the normal (defined as the second normal m)₂) Is a perpendicular line to the tangent plane of the curved surface where the shunt through-hole 102 is located, and the perpendicular line passes through the center of the sphere where the curved surface is located. That is, the shunt holes 102 are arranged in parallel or obliquely along a radial line passing through the center of the sphere of the curved surface. When the shunt hole 102 is disposed obliquely, the inclination angle (i.e., the included angle α) is greater than 0 ° and equal to or less than 15 °.

In some embodiments, the element body 101 is pyramidal in shape. In this embodiment, the shunt element 100 is generally conical. As shown in fig. 6, the angle α between the axis of the shunt hole 102 and the normal of the surface (curved surface) on which the shunt hole is located is 0 ° to 15 °. Here, the normal line (defined as a third normal line m)₃) Is a perpendicular to the tangent plane of the curved surface on which the shunt hole 102 is located, and the perpendicular passes through the axis of the shunt element 100. When the shunt hole 102 is obliquely arranged, the inclination angle α is greater than 0 ° and equal to or less than 15 °.

In some embodiments, the element body 101 is frustoconical in shape. In this embodiment, the flow distribution element 100 is a frustum. The included angle between the axial line of the shunt through hole 102 and the normal of the surface (curved surface) where the shunt through hole is located is 0-15 degrees. Here, the normal line on the side surface of the frustum-shaped body is a third normal line m₃The normal line on the upper bottom surface of the frustum body is a first normal line m₁。

For the flow dividing element 100 with the cap-shaped body, as shown in fig. 7, which includes a side surface portion, a transition curved surface portion and a flat surface portion (i.e. an upper bottom surface), among the plurality of flow dividing through holes 102 distributed on the cap-shaped body, the normal line on the side surface portion is a third normal line m₃The normal line on the plane part is a first normal line m₁The normal line on the transition curved surface part is a second normal line m₂。

In some embodiments, the angle α between the axis of the shunt hole 102 and the normal of the surface on which the shunt hole is located is 5 ° to 15 °. Optionally, the included angle α is 8 ° to 12 °. Optionally, the included angle α is 10 °.

Optionally, the axes of the plurality of shunt holes 102 each intersect the axis of the shunt element 100. Optionally, the axes of the plurality of shunt holes 102 each intersect the axis of the inflow side of the shunt element 100. That is, the plurality of flow dividing through holes 102 are arranged in a diverging manner in the flow direction of the fluid (the direction indicated by the arrow in fig. 2). After the fluid (for example, two-phase refrigerant) flowing in the axial direction flows through the flow dividing element 100, the formed turbulence is stronger, the refrigerant with high speed generates vortex under the action of the pressure difference between the front and the rear of the flow dividing element 100, and the gas-phase refrigerant and the liquid-phase refrigerant are better and fully mixed.

Optionally, in the shunt element 100, the included angle α between the axis of the plurality of shunt through holes 102 and the normal of the surface (the plane of the plate-shaped body) on which the shunt through holes are located is the same or different.

In some embodiments, as shown in connection with fig. 9-a-9-l, the cross-sectional shape of the shunt holes 102 comprises a regular geometric shape, an irregular geometric shape, or a pattern of multiple geometric shapes. Without limitation, the determination may be made according to requirements.

Alternatively, the regular geometric shape includes, but is not limited to, a triangle, a square, a circle, a polygon, etc., wherein the polygon is a regular polygon or a non-regular polygon having a side length greater than or equal to 5.

Alternatively, among the plurality of geometric shapes, the plurality of geometric shapes form a pattern having a predetermined pattern in a predetermined layout. Wherein the plurality of geometries may be the same (as shown in fig. 9-j and 9-k) or different.

Optionally, the irregular geometry is primarily directed to a body of in situ synthesized porous media material. For example, a porous metal material, such as porous metallic nickel, porous metallic titanium, or the like. Of course irregular geometries can also be obtained by structuring or braiding the filamentary material on a solid body. Such as the one shown in fig. 9-l, which is a flow distribution through hole 102 having an irregular geometric shape in cross-section.

The distribution of the plurality of shunt holes 102 on the shunt element 100 according to the embodiment of the present disclosure is not limited, and may be distributed according to a set rule. Optionally, the plurality of shunt through holes 102 are uniformly distributed on the element body 101 according to a set rule.

In some embodiments, as shown in fig. 9-a to 9-e, the plurality of shunt holes 102 are arranged in an array.

Alternatively, as shown in fig. 9-a to 9-d, the plurality of shunt holes 102 are arranged in a square array. Alternatively, the plurality of shunt holes 102 are arranged in a plurality of concentric circular arrays as shown in fig. 9-e.

In some embodiments, as shown in fig. 9-f to 9-i, the plurality of shunt holes 102 are arranged in multiple columns, and the shunt holes 102 in adjacent columns are staggered; alternatively, the plurality of shunt holes 102 are arranged in multiple rows, and the shunt holes 102 in adjacent rows are staggered.

In some embodiments, the plurality of shunt holes 102 are arranged in a spiral shape on the device body 101.

In some embodiments, as shown in FIGS. 9-i through 9-k, 9-m, and 9-n in conjunction with FIGS. 9-i through 9-k, adjacent ones of the plurality of flow splitting channels are co-extensive with the flow splitting through apertures 102. The plurality of flow-dividing channels are mesh openings and the flow-dividing element 100 forms a mesh-like flow-dividing element 100.

Optionally, the plurality of shunt through holes 102 are arranged in an array, and adjacent shunt through holes 102 share a common edge.

Optionally, the plurality of shunt through holes 102 are staggered and adjacent shunt through holes 102 share a common edge. For example, as shown in fig. 9-m, a square shunt element 100 forming a square grid of through holes. As shown in fig. 9-n, the flow dividing through-holes 102 of the regular hexagon form a flow dividing element 100 having honeycomb-shaped through-holes.

In the embodiment of the present disclosure, the apertures of the plurality of shunt channels in the shunt element 100 are the same or different. The method is determined according to actual needs.

In some embodiments, the shunt element 100, as shown in connection with fig. 5 and 8, further comprises a mounting structure 103 disposed on an edge of the element body 101. Facilitating assembly of the shunt element 100 into the dispenser. Optionally, the assembly structure 103 comprises an annular ring body, which is fittingly connected to a port of the curved body.

In the shunt element 100 of the embodiment of the present disclosure, the element body 101 may be divided into a plate-like body and a non-plate-like body according to the shape of the element body 101. Accordingly, the shunt element 100 is divided into a plate-shaped shunt element and a non-plate-shaped shunt element.

In some embodiments, the characteristic ratio of the height a of the element body 101 of the shunt element 100 to the characteristic length B of the element body 101 is equal to or greater than 0 and less than or equal to 1.5. That is, when the characteristic ratio is 0, the height a is 0, that is, the element body 101 of the shunt element 100 has a plate shape. When the characteristic ratio is not 0, the height a is not 0, and the element body 101 of the shunt element 100 is non-plate-shaped, and may be curved (like a bowl, as shown in fig. 3), conical (as shown in fig. 6), frustum-shaped, or cap-shaped (as shown in fig. 7). The characteristic ratio may be determined according to the specific shape of the element body 101.

When the element body 101 of the shunt element 100 is non-plate-shaped, the characteristic length B of the element body 101 is the characteristic length of the port of the element body 101. The characteristic length is a parameter that can represent the shape characteristic of the element body 101 (or the port thereof), for example, when the element body 101 is circular, the characteristic length is the length of a radius; when the element body 101 is square, the characteristic length is a length of a side.

The height a of the element body 101 and the characteristic length B of the element body 101 are shape characteristic parameters of the shunt element 100, and can represent characteristic parameters of the body shape. The shape characteristic parameters of the shunt element 100 vary according to the shape thereof.

Referring to fig. 3 to 5, the present disclosure provides a curved flow-splitting element 110, which includes a curved body, on which a plurality of flow-splitting through holes 102 are distributed, and a porosity of the curved body is 68% to 75%; and the included angle between the axis of the shunt through hole 102 and the normal of the curved surface where the shunt through hole is located is 0-15 degrees. After the fluid passes through the curved body, the flow direction of the fluid is diffused, the turbulence intensity is high, and the mixing effect is good.

In some embodiments, a first characteristic ratio of the height a1 of the curved body to the characteristic length B1 of its port is equal to or greater than 0.1 and less than or equal to 0.4. The curved surface-shaped body of the embodiment can obtain a better mixed flow effect by controlling the concave degree of the curved surface, and achieves or even exceeds the mixing effect of the existing Venturi distributor.

Optionally, the first characteristic ratio value is equal to or greater than 0.15 and less than or equal to 0.3. Optionally, the first characteristic ratio value is equal to or greater than 0.15 and less than or equal to 0.2. Optionally, the first characteristic ratio is 0.18. Alternatively, the first characteristic ratio is any value within the range of [0.1, 0.4], which is not enumerated herein.

The structural parameters of the shunt holes 102 on the curved shunt element 110 according to the present disclosure can be obtained by referring to the above related contents, and are not described herein again.

Optionally, the height a1 of the curved body is equal to or greater than 2mm and less than or equal to 50 mm. In this embodiment, the value range of the characteristic length B1 of the port of the curved body is determined by combining the value range of the first characteristic ratio. The characteristic length B1 of the port of the curved body can be determined by the size of the distribution chamber of the fluid distributor to which the flow dividing element is assembled, and the first characteristic ratio is combined to determine the height a1 of the curved body.

Optionally, the height a1 of the curved body is equal to or greater than 5mm and less than or equal to 40 mm.

Optionally, the height a1 of the curved body is equal to or greater than 8mm and less than or equal to 30 mm.

Optionally, the height a1 of the curved body is equal to or greater than 10mm and less than or equal to 20 mm.

In some embodiments, the curved body has a radius R1 of 10-15. Alternatively, R1 is 12.

Optionally, the curved body is a segment or a hemisphere.

In some embodiments, the curved shunt element 110 further comprises a mounting structure 103 disposed at the end of the curved body. Facilitating assembly of the shunt element 100 into the dispenser. Optionally, the assembly structure 103 comprises an annular ring body, which is fittingly connected to a port of the curved body.

Alternatively, the cross section of the assembly structure 103 in the form of an annular ring body is trapezoidal, and the end of the curved body is connected with the small-sized end of the assembly structure 103. After the curved surface-shaped flow distribution body is assembled in the distribution cavity of the fluid distributor, the curved surface-shaped flow distribution body is ensured to have a certain distance with the inner wall of the distribution cavity, and the smooth passing of fluid is ensured.

Referring to fig. 7 and 8, the embodiment of the present disclosure provides a cap-shaped shunt element 120, which includes a cap-shaped body, on which a plurality of shunt through holes 102 are respectively disposed, and a porosity of the cap-shaped body is 68% to 75%; and the included angle between the axis of the shunt through hole 102 and the normal of the curved surface where the shunt through hole is located is 0-15 degrees.

In some embodiments, a second characteristic ratio of the height a2 of the cap body to the characteristic length B2 of its port is equal to or greater than 0.7 and less than or equal to 1.5. The cap-shaped body of the embodiment can obtain a better mixed flow effect by controlling the concave degree of the cap shape, and achieves or even exceeds the mixing effect of the existing Venturi distributor.

Optionally, the second characteristic ratio value is equal to or greater than 0.75 and less than or equal to 1.25. Optionally, the second characteristic ratio value is equal to or greater than 0.9 and less than or equal to 1.1. Optionally, the second characteristic ratio value is equal to 1.0. Alternatively, the second characteristic ratio is any value within the range of [0.7,1.5], for example, 0.7, 0.75, 0.8, 0.9, 1.0, 1.1, 1.2, 1.25, 1.3, 1.4 or 1.5, not to mention here.

The structural parameters of the shunt hole 102 on the cap-shaped shunt element 120 according to the embodiment of the disclosure may refer to the related contents, and are not described herein again.

In some embodiments, the height a2 of the cap-shaped body is equal to or greater than 5mm and less than or equal to 60 mm. In this embodiment, the value range of the characteristic length B2 of the port of the cap-shaped body is determined in combination with the value range of the second characteristic ratio. Wherein the characteristic length B2 of the port of the cap-shaped body is further determined by the size of the dispensing chamber of the fluid dispenser to which the flow splitting element 100 is fitted, in combination with the second characteristic ratio value to determine the height a2 of the cap-shaped body.

Optionally, the height a2 of the cap-shaped body is equal to or greater than 6mm and less than or equal to 50 mm.

Optionally, the height a2 of the cap-shaped body is equal to or greater than 8mm and less than or equal to 40 mm.

Optionally, the height a2 of the cap-shaped body is equal to or greater than 10mm and less than or equal to 30 mm.

Optionally, the height a2 of the cap-shaped body is equal to or greater than 12mm and less than or equal to 20 mm.

Optionally, the height a2 of the cap-shaped body is equal to 15 mm.

The cap-shaped body comprises a side surface part, a transition curved surface part and a plane part; the transitional curved surface part is in transitional connection with the side surface part and the plane part to form a hat-shaped body.

Optionally, the cap body includes a side portion that is parallel to or inclined toward an axis of the cap body. When the side surface portion is inclined toward the axis of the cap-shaped body, the length of the projection of the side surface portion on a plane perpendicular to the axis of the cap-shaped body is equal to or greater than 1mm and less than or equal to 20 mm.

Optionally, the curved surface radius R2 of the transition curved surface part is 2-15. Optionally, the curved surface radius R2 of the transition curved surface part is 4-10. Optionally, the curved surface radius R2 of the transition curved surface portion is 6. Alternatively, the curved surface radius R2 of the transition curved surface portion may be any value within the range of [2, 15 ].

In some embodiments, the cap shunt element 120, further comprising, the mounting structure 103, is disposed on a port of the cap body. Facilitating assembly of the flow dividing element into the dispenser. Optionally, the fitting structure 103 comprises an annular ring body, which is fittingly connected to the port of the cap-shaped body.

Alternatively, the cross-section of the fitting structure 103 in the form of an annular ring body is trapezoidal, and the end of the cap-shaped body is connected with the small-sized end of the fitting structure 103. After the cap-shaped flow distribution body is assembled in the distribution cavity of the fluid distributor, the cap-shaped flow distribution body is ensured to have a certain distance with the inner wall of the distribution cavity, and the smooth passing of fluid is ensured.

As shown in fig. 10 to 21, an embodiment of the present disclosure provides a fluid distributor 200 including the shunt element 100 of any one of the foregoing embodiments.

The fluid distributor 200 of the embodiment of the disclosure can be reduced in external dimension, has low requirement on structural space and saves design space. The fluid distributor 200 has good uniformity and stability, and can achieve uniformity and stability even superior to those of the existing venturi distributor; furthermore, the heat exchanger adopting the liquid separator has uniform flow distribution and improved energy efficiency. Meanwhile, the fluid distributor 200 of the embodiment of the disclosure has the advantages of simple structure, easy processing and forming and low processing cost.

In some embodiments, a fluid distributor 200 comprises a distributor body, a flow dividing element 100 of any of the previous embodiments, an inlet pipe 220, and a plurality of distribution branches 230, wherein a distribution chamber 210 is arranged in the distributor body; the flow dividing element 100 is disposed in the distribution chamber 210 and divides it into a front chamber 211 and a rear chamber 212; the liquid inlet pipe 220 is communicated with the front cavity 211; a plurality of distribution branches 230 communicate with the back volume 212. Wherein the liquid inlet pipe 220 and the plurality of distribution branch pipes 230 are parallel to the axis of the flow dividing element 100. The shunt element 100 comprises an element body 101, wherein the element body 101 is provided with a plurality of shunt through holes 102, and the porosity of the element body is 60-78%; and the included angle between the axis of the shunt through hole 102 and the normal of the surface where the shunt through hole is located is 0-15 degrees.

In the presently disclosed embodiment, the distributor body generally includes a transition chamber 213 and a distribution chamber 210, and as shown in fig. 11, the distribution chamber 210 is a straight cylinder (e.g., a cylinder), the transition chamber 213 is tapered, the small-diameter end is connected to the liquid inlet pipe 220, and the large-diameter end is the same size as the inlet end of the distribution chamber 210. Thus, the dispensing chamber 210 described below refers to a chamber body that is a straight cylindrical body portion. Of course, the distribution chamber 210 is not limited to a straight cylinder shape in the embodiments of the present disclosure, and may be a cylinder with other shapes or with variable diameters.

The shunt element 100 is disposed in the distribution cavity 210, and divides the distribution cavity 210 into a front cavity 211 and a rear cavity 212, the front cavity 211 is a cavity between the element body 101 of the shunt element 100 and the inlet end of the distribution cavity 210, and the rear cavity 212 is a cavity between the element body 101 and the outlet end of the distribution cavity 210. When the expanded refrigerant enters the distribution chamber 210 through the liquid inlet pipe 220, the gas phase and the liquid phase are mixed uniformly due to the sudden expansion of the pipe diameter. While still having large droplets or bubbles, the accompanying flow pattern includes bubble flow, bullet flow, etc., and the flow state is still unstable and uneven. The flow dividing element 100 (e.g., the curved flow dividing element 110 and the cap flow dividing element 120) breaks up the larger bubbles and droplets, so that the flow pattern is changed into a mist flow in a stable state, the phase separation phenomenon in the fluid distributor 200 is largely prevented, and the distribution branch pipes 230 uniformly distributed at the top end of the distributor can obtain a more stable flow ratio under variable operating conditions. By adopting the flow dividing element 110, the change of the outlet temperature and the superheat degree of the heat exchanger under the variable working condition has certain stability and regularity, so the working stability of the feedback regulation logic of the electronic expansion valve can be improved.

The axial length H of the distribution chamber 210 is not limited and may be determined according to the installation space. Optionally, the axial length H of the dispensing chamber 210 is not less than 30 mm. The axial length H of the dispensing chamber 210 may be maximized as the installation space permits. Optionally, the axial length H of the distribution chamber 210 is equal to or greater than 30mm and less than or equal to 60 mm. Optionally, the axial length H of the distribution chamber 210 is equal to or greater than 35mm and less than or equal to 50 mm.

In some embodiments, the first ratio of the axial length C of the front cavity 211 to the axial length H of the dispensing cavity 210 is not less than 0.3. That is, the axial length of the front cavity 211 is controlled to a minimum value to ensure mixing. The fluid dispenser 200 having the dispensing chambers 210 of different axial lengths may be selected depending on the installation space, achieving a better mixing uniformity effect. In this embodiment, the axial length C of the front cavity 211 is a first axial distance between the element body 101 of the flow dividing element 100 and the inlet end 214 of the distribution cavity 210, and when the flow dividing element 100 is in a non-plate-like structure, the axial length C of the front cavity 211 is a distance from the inlet end 214 of the distribution cavity 210 to a farthest point (or, highest point) of the element body 101 in the axial direction. Accordingly, the ratio of the axial length D of the rear cavity 212 to the axial length H of the distribution cavity 210 is not higher than 0.7.

Optionally, the axial length C of the front cavity 211 does not exceed 60 mm. That is, the first axial distance between the element body 101 of the shunt element 100 and the inlet end 214 of the distribution chamber 210 is no more than 60 mm. In this embodiment, the specific value of the axial length C varies according to the body shape of the flow dividing element 100.

Optionally, the axial length C of the front cavity 211 is equal to or greater than 5mm and less than or equal to 60 mm.

Optionally, the axial length C of the front cavity 211 is equal to or greater than 8mm and less than or equal to 50 mm.

Optionally, the axial length C of the front cavity 211 is equal to or greater than 10mm and less than or equal to 30 mm.

Optionally, the axial length C of the front cavity 211 is equal to or greater than 12mm and less than or equal to 20 mm.

Optionally, the axial length C of the front cavity 211 is equal to or greater than 15 mm.

In some embodiments, the axial length C of the front cavity 211 comprises the mounting height h of the shunt element 100 and the height a of the element body 101; the mounting height h of the shunt element 100 is the second axial distance between the mounting end 104 of the shunt element 100 to the inlet end 214 of the distribution chamber 210.

Optionally, a second ratio of the mounting height H of the flow diversion element 100 to the axial length H of the distribution chamber 210 is no more than 0.3. The control of the first ratio and the second ratio is integrated to ensure that large liquid drops and bubbles in the refrigerant are fully broken by the bowl-shaped flow dividing device to form a turbulent flow area.

In some embodiments, when the flow dividing element 100 is a plate-shaped flow dividing element 100, the axial length C of the front cavity 211 is the installation height h of the plate-shaped flow dividing element 100. The axial length C of the front cavity 211 is equal to or greater than 5mm and less than or equal to 15 mm.

In some embodiments, when the flow distribution element 100 is a non-plate-like flow distribution element 100, the first ratio of the axial length C of the front cavity 211 to the axial length H of the distribution cavity 210 is not less than 0.3; and a second ratio of the axial distance H (i.e., the mounting height H) from the mounting end 104 of the flow diversion element 100 to the inlet end 214 of the distribution chamber 210 to the axial length H of the distribution chamber 210 is no more than 0.3.

In some embodiments, when the shunt element is the curved shunt element 110, the first ratio is equal to or greater than 0.3 and less than or equal to 0.7; the second ratio is equal to or greater than 0.15 and less than or equal to 0.3. The curved shunt element 110 is shaped like a bowl, and the forming method and material are not limited, for example, a curved mesh shunt element.

Optionally, the first ratio is equal to or greater than 0.4 and less than or equal to 0.6. For example, the first ratio is any value within the range of 0.3, 0.4, 0.5, 0.6, or [0.3, 0.7 ]. Optionally, the second ratio is 0.2. For example, the second ratio is 0.15, 0.2, 0.3, or any value within the range of [0.15, 0.3 ].

Optionally, the installation height h of the curved shunt element 110 is equal to or greater than 5mm and less than or equal to 10 mm. In this embodiment, the height a of the curved shunt element 110 may be as described above.

Optionally, a third ratio of the axial distance D' between the mounting end 104 of the curved flow splitting element 110 to the outlet end 215 of the distribution chamber 210 to the axial length H of the distribution chamber 210 is equal to or greater than 0.4 and less than or equal to 0.7. Optionally, the third ratio is equal to 0.5.

In some embodiments, when the shunt element is the cap shunt element 120, the first ratio is equal to or greater than 0.3 and less than or equal to 0.93. The second ratio is equal to or greater than 0 and less than or equal to 0.2. The cap-shaped shunt element 120 is formed by any method or material, such as the cap-shaped wire mesh shunt element 100.

Optionally, the first ratio is equal to or greater than 0.4 and less than or equal to 0.8. Optionally, the first ratio is equal to or greater than 0.5 and less than or equal to 0.6. For example, the first ratio is any value within the range of 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, or [0.3, 0.93 ]. Optionally, the second ratio is equal to or greater than 0 and less than or equal to 0.15. Optionally, the second ratio is equal to or greater than 0 and less than or equal to 0.1. Alternatively, the second ratio is 0, i.e., the mounting end 104 of the cap-shaped flow diversion element 120 overlaps the inlet end 214 of the distribution chamber 210, as shown in FIG. 15.

Optionally, the mounting height h of the cap-shaped shunt element 120 is equal to or greater than 0mm and less than or equal to 6 mm. In this embodiment, the height a of the cap-shaped shunt element 120 is as described above.

Optionally, the axial distance between the planar portion of the cap-shaped flow-splitting element 120 and the outlet end 215 of the distribution chamber 210 is not less than 2.5 mm. The back cavity 212 is ensured to have enough mixing space, so that the fluid enters the distribution branch pipe 230 after being uniformly mixed, and the uniformity and the stability are improved.

Optionally, the cap-shaped body comprises side portions at a distance from the inner wall of the dispensing chamber 210 equal to or greater than 1mm and less than or equal to 20 mm. The fluid after the mixed flow is not retained therein while ensuring a stronger turbulent effect by collision with the inner wall of the distribution chamber 210, and can smoothly flow into each of the distribution branch pipes 230.

In some embodiments, distribution manifold 230 is inserted a length into distribution chamber 210. The distribution branch pipes 230 are inserted into the distribution chamber 210 to a certain depth, and in a space formed by the outlets of the distribution branch pipes 230 and the top wall surface of the distribution chamber 210, two-phase fluids form a turbulent flow area due to the difference of inertia forces, so that the mixing uniformity is further improved, the uniformity of flow distribution is improved, and the refrigerant can uniformly flow out of each distribution branch pipe 230.

Optionally, the insertion length E of the distribution manifold 230 does not exceed 6 mm. Optionally, the insertion length E does not exceed 5.5 mm. Optionally, the insertion length E is 1mm to 5.5 mm. Optionally, the insertion length E is 3mm to 5 mm. Optionally, the insertion length E is 4 mm. For example, the insertion length E is 1mm, 2mm, 2.5mm, 3mm, 4mm, 5mm, 5.5mm, 6mm, or any other value within the above range.

In some embodiments, the plurality of distribution legs 230 are uniformly disposed on the end face of the outlet end 215 of the distribution chamber 210. The fluid diversion conditions, such as diversion speed and diversion flow rate, etc., within each distribution branch 230 are guaranteed to be consistent.

Optionally, as shown in fig. 16 to 21, an included angle β between the distribution symmetry plane q of the plurality of distribution branch pipes 230 and the plane p on which the liquid inlet pipe 220 is located is 0 ° to 45 °. In this embodiment, the distribution symmetry plane q of the plurality of distribution branches 230 is a symmetry plane passing through the axis of the distribution chamber 210. When the liquid inlet pipe 220 is a straight pipe, the plane p on which the liquid inlet pipe 220 is located can be determined arbitrarily. When the liquid inlet pipe 220 has a bend, there is only one plane p on which the bent liquid inlet pipe 220 is located. Optionally, the included angle β is any angle within the range of 0 °, 10 °, 20 °, 30 °, 45 °, or [0 °, 45 ° ].

Optionally, when the liquid inlet pipe 220 is bent, an included angle β between a symmetric plane q of the plurality of distribution branch pipes 230 and a plane p on which the bent liquid inlet pipe 220 is located is 0 ° to 45 °. As shown in fig. 16 and 17, the bent liquid inlet pipe 220 includes a first pipe section 221 and a second pipe section 222 which are communicated, and the axial direction of the first pipe section 221 intersects with the axial direction of the second pipe section 222; the first pipe section 221 communicates with the front cavity 211.

Optionally, the distribution symmetry plane q of the plurality of distribution branch pipes 230 forms an angle of 0 ° with the plane p of the liquid inlet pipe 220. That is, the plurality of distribution branches 230 are uniformly disposed on the end surface of the outlet end 215 of the distribution chamber 210 and are disposed on both sides of the plane p in mirror symmetry. The distribution arrangement of the plurality of distribution branch pipes 230 of the present embodiment is defined as a 0 ° distribution pattern. Then, the distribution arrangement manner, that is, the β distribution manner, is obtained by rotating the plurality of distribution branch pipes 230 distributed at 0 ° by an angle β with the axis of the distribution chamber 210 as the rotation axis, so that the included angle between the distribution symmetry plane q of the plurality of distribution branch pipes 230 and the plane p where the liquid inlet pipe 220 is located is β. Wherein β is greater than 0 ° and less than or equal to 45 °.

Alternatively, when the number of distribution branches 230 is odd, the distribution symmetry plane q of the plurality of distribution branches 230 passes at least the axis of one distribution branch 230. Such as the 0 deg. distribution pattern of 3 distribution branches 230 shown in figure 19.

Alternatively, when the number of distribution branches 230 is even, the distribution symmetry plane q of the plurality of distribution branches 230 passes through the axis of 0 or an even number of distribution branches 230. Optionally, the distribution symmetry plane q of the plurality of distribution branches 230 passes through the axis of 0 distribution branches 230, i.e. not through the axis of any one distribution branch 230. As shown in fig. 20, the state where the angle between the plane p and the plane q of the distribution symmetry plane passing through the axes of 0 distribution branch pipes 230 is 0 ° is defined as a 0 ° distribution pattern.

In some embodiments, mounting structures 216 are provided on the inner wall of the dispensing chamber 210 for mounting the shunt element 100.

Optionally, mounting structure 216 includes a raised ring or a plurality of raised points that project into dispensing chamber 210. For snap-fit assembly of the shunt element 100. The mounting structure 216 may be formed by rolling or the like during assembly of the shunt element 100. Of course, the manner and timing of molding the mounting structure 216 is not limited. The mounting structure 216 protrudes into the distribution cavity 210, so that the inner diameter of the distribution cavity 210 is changed, two-phase refrigerants can promote mixing to be more uniform under the action of pressure mutation, the cost is saved, the processing is simple, the mounting is convenient, the liquid distribution is uniform, and the operation effect is reliable.

Alternatively, for the curved shunt element 110, two loops of mounting structures 216 are provided on the inner wall of the distribution chamber 210, and the first mounting structure 103 of the curved shunt element 110 is clamped between the two loops of mounting structures 216.

Optionally, for the cap-shaped flow-dividing element 120, a ring of mounting structures 216 is provided on the inner wall of the distribution chamber 210, which form a snap-in position with the edge of the transition chamber 213 of the distributor body, in which the second assembly structure 103 of the cap-shaped flow-dividing element 120 is snapped in.

In some embodiments, the fluid distributor 200 is vertically installed, and the included angle γ between the axis of the fluid distributor 200 and the vertical direction is 0 ° to 15 °. The vertical installation degree of the fluid distributor 200 is ensured, and the uniformity and stability of fluid distribution, especially the distribution stability under different refrigeration working conditions, are effectively ensured.

Optionally, the fluid distributor 200 further comprises an angle sensor for detecting an angle between an axial direction and a vertical direction of the fluid distributor 200. The included angle is the installation angle.

Optionally, the fluid dispenser 200 further comprises an alarm unit (not shown) for giving an alarm when the installation angle detected by the angle sensor exceeds a set value. Optionally, the input end of the alarm unit is connected with the output end of the angle sensor; when the mounting angle detected and obtained by the angle sensor is larger than a set value, an alarm signal is sent to an alarm unit; and the alarm unit sends out an alarm after receiving the alarm signal. The alarm unit comprises an acoustic and/or optical alarm.

In some embodiments, one or more flow distribution elements 100, a plurality of flow distribution elements 100 are disposed parallel to each other within the distribution chamber 210 of the fluid dispenser 200.

In some embodiments, a plurality of shunt elements 100 are provided within the fluid dispenser 200, the plurality of shunt elements 100 being the same or different.

Optionally, the distributor is divided into a front chamber 211 and a rear chamber 212, with reference to the flow dividing element 100 near the inlet end 214 of the distributor. That is, when a plurality of the shunt elements 100 are disposed in the distribution chamber 210, the nth shunt element 100 is disposed in the rear chamber 212, and n is an integer equal to or greater than 2.

The disclosed embodiment also provides a shunt tube set comprising the fluid distributor 200 of any of the previous embodiments. With the shunt tube set of the fluid dispenser 200 of the disclosed embodiment, the fluid conditions in each tube set can be made consistent and stable.

The following provides a specific embodiment of the fluid distributor 200 according to the embodiment of the present disclosure, and obtains the unevenness index and the instability index of the fluid distributor 200 according to the specific embodiment through fluid simulation analysis, and obtains the corresponding female parent unevenness index and the female parent instability index under the set refrigeration condition by using the existing venturi distributor as the female parent distributor, and respectively uses the female parent unevenness index and the female parent instability index as the set unevenness index and the set instability index.

Example 1

A fluid distributor 200 in which a flow dividing member 100 is provided as a cap-shaped flow dividing member 120, an axial length H of a distribution chamber 210 is 30mm, an axial length C (i.e., a first axial distance) of a front chamber 211 is 15mm, and a mounting height H (i.e., a second axial distance) of the flow dividing member 100 is 0 mm. The height a of the cap shunt element 120 is 15mm and the characteristic length B of the port is 16.8 mm. The number of distribution branches 230 is 4. Other parameters refer to the above mentioned related contents.

In the fluid distributor 200 of the present embodiment 1, the first characteristic ratio of the cap-shaped flow distribution element 120 is 0.9, the first ratio is 0.5, and the second ratio is 0. The cap shunt element 120 can be formed in any of the three manners described above, such as a wire mesh shunt element 100 formed by braiding wires. Optionally, the mesh number of the wire mesh shunt element 100 is 80 mesh, 90 mesh, 100 mesh, or the like, and the wire diameter is 0.08mm, 0.1mm, or 0.12 mm.

Specifically, the following four wire mesh shunt elements were obtained by wire weaving, and the physical parameters are shown in table 1 below:

numbering	Number of meshes	Wire diameter	Porosity of the material	Effective area
					Wire mesh I	100 mesh	0.1mm	69％	37％
Wire mesh II	100 mesh	0.08mm	75％	49％
					Wire mesh III	80 mesh	0.12mm	70％	44％
Wire mesh IV	80 mesh	0.1mm	75％	43％
					Comparative wire mesh	60 mesh	0.1mm	80％	52％

Wherein, the porosity is calculated by the following formula: 1-pi ds N/(0.0254 x 4); wherein ds is the diameter of the wire, m; n is the mesh number. Wherein ds is the width of the sidewall between adjacent shunt holes.

And forming by adopting the wire mesh with the four specifications to obtain the corresponding cap-shaped shunt elements I, II, III and IV.

In this embodiment 1, the following fluid simulation analysis was performed to verify the uniformity and stability of the fluid dispenser 200.

Fluid simulation analysis one: fluid simulations were performed for the fluid distributors i, ii, iii and iv provided with the cap-shaped shunt elements i, ii, iii and iv, respectively, and for the comparative fluid distributors using the comparative cap-shaped shunt elements obtained by comparative wire mesh molding, the simulation results being shown in fig. 22-a, b. Analysis shows that the cap-shaped flow dividing element with the porosity of 75%, 70% and 69% has better uniformity and stability.

And (2) fluid simulation analysis: the cap-shaped flow-dividing element i (obtained from a wire mesh i with a porosity of 69%) is used for the fixation, the axial length H of the distribution chamber 210 being varied, the other parameters remaining unchanged. Simulation results were obtained for axial lengths H of the distribution chamber 210 of 20mm, 25mm, 30mm and 35mm, respectively, as shown in fig. 23-a, b. Analysis shows that the fluid distributor 200 with the axial length H of the distribution chamber 210 of 30mm and 35mm has good uniformity and stability, which reaches the uniformity and stability of the existing Venturi distributor. And shows a tendency to decrease the unevenness and the instability as the axial length H increases, i.e., a tendency to improve the uniformity and the stability.

And (3) fluid simulation analysis: the porosity of the fixed cap-shaped flow distribution element 120 is 69%, the axial length H of the distribution chamber 210 is 30mm, the insertion length E of the distribution branch 230 is changed, and the other parameters are not changed. Simulation results were obtained for the insertion lengths of the distribution branch pipes 230 as shown in FIGS. 24-a, b as being 1mm, 2.5mm, 4mm, 5.5mm and 7 mm. Analysis shows that the distribution branch pipe 230 has good uniformity and stability when the insertion length is not more than 6mm, and the uniformity and stability of the existing Venturi distributor are achieved.

And (4) fluid simulation analysis: the porosity of the fixed cap-shaped flow distribution element 120 is 69%, the distribution mode of the plurality of distribution branch pipes 230 is changed, that is, the included angle β between the distribution symmetry plane q of the plurality of distribution branch pipes 230 and the plane p where the liquid inlet pipe 220 is located is unchanged, and other parameters are not changed. Simulation results were obtained for angles beta of 0 deg., 30 deg., 45 deg., and 60 deg., respectively, as shown in fig. 25-a, b. Analysis shows that the included angle beta is controlled within the range of 0 degrees and 45 degrees, so that the uniformity and the stability of the existing Venturi distributor are achieved.

And (5) performing fluid simulation analysis: the porosity of the fixed cap shunt element 120 is 69%, the included angle γ of the fluid distributor 200 is changed, and other parameters are not changed. Simulation results were obtained for the mounting angles γ of 0 °, 15 °, and 30 °, respectively, as shown in fig. 26-a, b. Analysis shows that the mounting included angle gamma is in the range of 0-15 degrees, the uniformity and the stability are good, and the uniformity and the stability of the existing Venturi distributor are achieved.

Example 2

A fluid distributor 200, in which a flow dividing element 100 is provided as a curved flow dividing element 110, an axial length H of a distribution chamber 210 is 30mm, an axial length C (i.e., a first axial distance) of a front chamber 211 is 13mm, and a mounting height H (i.e., a second axial distance) of the flow dividing element 100 is 10 mm. The curved shunt element 110 has a porosity of 69%, a height a of 3mm, and a characteristic length B of the port of 16.8 mm. The number of distribution branches 230 is 4. Other parameters refer to the above mentioned related contents.

In the fluid distributor 200 of the present embodiment, the first ratio of the curved flow-dividing element 110 is 0.18, the first ratio is 0.43, the second ratio is 0.3, and the third ratio is 0.66. The curved shunt element 110 can be formed by any of the three methods described above, for example, the wire mesh shunt element 100 obtained by wire weaving. Optionally, the mesh number of the wire mesh shunt element 100 is 80 mesh, 90 mesh, 100 mesh, or the like, and the wire diameter is 0.08mm, 0.1mm, or 0.12 mm.

Specifically, in this example 2, curved flow dividing elements i, ii, iii, and iv were obtained using four kinds of wire nets of the specifications in table 1 of example 1, respectively.

In this example 2, the following fluid simulation analysis was performed to verify the uniformity and stability of the fluid dispenser 200.

Fluid simulation analysis one: fluid simulations were performed on the fluid distributors i, ii, iii and iv of i, ii, iii and iv provided with curved flow-splitting elements, respectively, and the comparative fluid distributors of comparative curved flow-splitting elements obtained by comparative wire mesh molding, the simulation results being shown in fig. 27-a, b. Analysis shows that the curved flow dividing element with the porosity of 75%, 70% and 69% has better uniformity and stability.

And (2) fluid simulation analysis: the fixing adopts a curved surface-shaped shunt element I (obtained by a wire mesh I with the porosity of 69 percent), the mounting height h is changed, and other parameters are unchanged. Simulation results were obtained for mounting heights h of 6mm, 10mm and 14mm, respectively, as shown in fig. 28-a, b. Analysis shows that the fluid distributor 200 with the installation height h less than or equal to 10mm has good uniformity and stability, and reaches the uniformity and stability of the existing venturi distributor.

In the fluid distributor 200 of this embodiment 2, for the axial length H of the distribution cavity 210, the insertion length E of the distribution branch pipes 230, the distribution manner of the plurality of distribution branch pipes 230, the installation included angle γ of the fluid distributor 200, and other parameters, the influence on the uniformity and stability of the fluid distributor 200 is the same as that in embodiment 1, and the obtained simulation result is the same as that in embodiment 1, and details thereof are not repeated.

In the embodiment of the present disclosure, the following fluid simulation method is adopted to obtain the non-uniformity index and the instability index of the fluid distributor 200, wherein the smaller the non-uniformity index is, the better the uniformity is; similarly, a smaller instability index indicates better stability. Specifically, the fluid simulation method comprises the following steps:

s110, constructing a shunt element 100 model according to the structural parameters of the shunt element 100, and obtaining the resistance coefficient of the shunt element 100 model through simulation calculation. The structural parameters of the shunt element 100 include the channel shape and the channel characteristic length of the shunt channel, and the porosity and the shape characteristic parameters of the shunt element 100, and the shape characteristic parameters include the height a of the shunt element 100, the characteristic length B of the port of the shunt element, and the characteristic ratio of the height a to the characteristic length B. By inputting the set structural parameters, a model of the set shunt element 100 is constructed.

And S120, constructing a fluid distributor 200 model according to the shunting unit model and the structural parameters of the fluid distributor 200. Wherein, the structural parameters of the fluid distributor 200 include an axial length C of the front cavity 211, a first ratio of the axial length of the front cavity 211 to the axial length of the distribution cavity 210; a second ratio of the mounting height h of the flow dividing element 100 to the axial length of the distribution chamber 210; and, for a third ratio of the axial length D' between the mounting end 104 of the curved flow-splitting element 110 and the outlet end 215 of the distribution chamber 210 to the axial length H of the distribution chamber 210, etc.

S130, under the set refrigeration working condition, according to the resistance coefficient of the flow dividing element 100 and the fluid distributor 200 model, obtaining the unevenness index of the fluid distributor 200 model corresponding to the set refrigeration working condition through simulation calculation. The set refrigeration condition includes a plurality of refrigeration conditions, for example, a rated refrigeration condition, a normal refrigeration condition, and a high-temperature refrigeration condition.

Specifically, the respective corresponding refrigerant shunt flows in the plurality of branch distribution pipes 230 of the fluid distributor 200 under the set refrigeration condition are obtained, so as to obtain the non-uniformity index epsilon of the fluid distributor 200 model under a certain set refrigeration condition_iNon-uniformity index ε_iCan be obtained by the following formula (1):

ε_i＝STD(Q₁、Q₂、……，Q_n) (1)

wherein Q is₁、Q₂、……，Q_nA plurality of refrigerant branch flow rates, n being the number of distribution branch pipes 230; i represents different set refrigeration conditions.

The unevenness index epsilon under rated refrigeration working condition can be respectively obtained by the formula (1)₁And the non-uniformity index epsilon under the normal refrigeration working condition₂And the unevenness index epsilon under the high-temperature refrigeration working condition (43)₃And the unevenness index epsilon under the high-temperature refrigeration working condition (53)₄. Therefore, when ε₁、ε₂、ε₃And ε₄May be less than or equal to the female parent unevenness index, or ε₁、ε₂、ε₃And ε₄An average of less than or equal to the female parent non-uniformity index indicates that the fluid dispenser 200 has good uniformity.

And S140, obtaining the instability index of the fluid distributor 200 model according to the corresponding non-uniformity indexes of the set refrigeration working conditions. The instability index a of the model of the fluid dispenser 200 is obtained from a plurality of non-uniformity indices. The instability index α is obtained by the following formula (2):

α＝STD(ε₁、ε₂、……，ε_i) (2)

wherein epsilon₁、ε₂、……，ε_iThe unevenness index under different set refrigeration conditions.

Therefore, when the unevenness index α is less than or equal to the instability index of the parent, it indicates that the fluid dispenser 200 has good stability.

The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A shunt element, comprising:

the element comprises an element body, a plurality of shunt through holes and a plurality of metal layers, wherein the element body is provided with a plurality of shunt through holes in a distributed mode, and the porosity of the element body is 60% -78%; and the included angle between the axis of the shunt through hole and the normal of the surface where the shunt through hole is located is 0-15 degrees.

2. The flow dividing element of claim 1,

the shunt element is obtained by constructing a plurality of shunt through holes on a solid body;

alternatively, the shunt element is woven from a filamentary material;

alternatively, the shunt element is constructed from a porous media material.

3. The shunt element of claim 2, wherein the solid body or the filamentary material comprises a metal, a fiber, or a plastic.

4. A shunt element according to claim 2, wherein said filamentary material has a filament diameter of 0.06 to 0.15 mm.

5. The shunt element of any one of claims 1 to 4, wherein the shape of said element body comprises: plate-like, curved, cone-like, frustum-like, or cap-like.

6. The shunt element of claim 5, wherein a characteristic ratio of a height of the element body to a characteristic length of the element body is equal to or greater than 0 and less than or equal to 1.5.

7. The flow distribution element according to any of claims 1 to 4, wherein the cross-sectional shape of the distribution through-hole comprises a regular geometric shape, an irregular geometric shape or a pattern of multiple geometric shapes.

8. The shunt element of any one of claims 1 to 4, wherein a plurality of said shunt holes are arranged in an array;

or the plurality of shunt through holes are arranged in multiple rows, and the shunt through holes in adjacent rows are staggered;

or the plurality of shunting through holes are arranged in multiple rows, and the shunting through holes in adjacent rows are staggered;

or a plurality of the shunting through holes are spirally arranged.

9. A fluid dispenser, comprising: a shunt element as claimed in any one of claims 1 to 8.

10. The fluid distributor of claim 9, wherein the fluid distributor is vertically mounted and the axis of the fluid distributor is angled from the vertical by an angle of 0 ° to 15 °.